an aquatic Central and South American opossum, Chironectes variegatus (or minimus), having webbed hind feet and a grayish coat.
Origin of yapok
First recorded in 1820–30; after Oyapok, a river forming the border between French Guiana and N Brazil
Also called water opossum.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019